Letpidoptera from Japan. 445 



secondaries the outer edge is alone indicated by black dots on 

 the veins ; a black marginal line; fringe brown : head brown, 

 first three abdominal segments with a central black dot. 

 Wings below shining grey, the markings obsolete; fringe 

 brown: body grey. Expanse of wings 2 inches 1 line. 



Inukois, n. gen. 



Allied to Cheimatobia (C. brumata), but the neuration 

 utterly different. In the primaries of Cheimatobia the costal 

 vein is normal, joining the costal margin at about the third 

 fourth ; in Inurois it unites with the subcostal vein just beyond 

 its origin. The subcostal vein of Cheimatobia has four branches, 

 all emitted at some distance from the end of the cell ; that of 

 Inurois has six branches, the first four of which are very 

 short, and cross the costal area much less obliquely than is 

 usual. In Cheimatobia the upper radial is trifurcate, the upper- 

 most branch uniting with the subcostal so as to form a post- 

 discoidal cell ; in Inurois it is simple. In Cheimatobia the 

 lower radial is emitted from an angle of the lower discocellular ; 

 in Inurois it is emitted normally from between the two disco- 

 cellulars. In Cheimatobia these veinlets are irregular, and the 

 upper one sloping backwards ; in Inurois they are regular and 

 transverse. In the secondaries the differences are nearly as 

 striking : thus the subcostal vein of Cheimatobia emits its 

 branches from a long footstalk, whilst in Inurois there is none ; 

 Cheimatobia has the discocellulars oblique and sigmoidal, the 

 upper being about four times the length of the lower, but 

 Inurois has a perfectly simple angle, with the radial emitted 

 • from the centre ; in Cheimatobia the third median and radial 

 are about equal distances apart, whilst in Inurois the second 

 and third median branches are emitted near together and 

 at some distance from the radial. In other respects the 

 two genera are much alike, both in form, texture, and colo- 

 ration. 



Type I. tenuis. 



91. Inurois tenuis, n. sp. (nos. 553 & 556). 



Primaries semitransparent whity brown, with a faint indi- 

 cation of a slightly darker greyish broad central belt, its outer 

 edge dotted with black upon the veins ; a well-defined black 

 discocellular spot and a marginal series of black dots : secon- 

 daries slightly paler, with black discocellular and marginal 

 dots : body brown. Wings below with a brown discal line 

 across both primaries and secondaries. Expanse of wings $ 

 1 inch 2 lines, ? 1 inch 3 lines. 



